pub enum OutlivesBound<'tcx> {
    RegionSubRegion(Region<'tcx>, Region<'tcx>),
    RegionSubParam(Region<'tcx>, ParamTy),
    RegionSubAlias(Region<'tcx>, AliasTy<'tcx>),
}
Expand description

Outlives bounds are relationships between generic parameters, whether they both be regions ('a: 'b) or whether types are involved (T: 'a). These relationships can be extracted from the full set of predicates we understand or also from types (in which case they are called implied bounds). They are fed to the OutlivesEnv which in turn is supplied to the region checker and other parts of the inference system.

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RegionSubRegion(Region<'tcx>, Region<'tcx>)

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RegionSubParam(Region<'tcx>, ParamTy)

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RegionSubAlias(Region<'tcx>, AliasTy<'tcx>)

Auto Trait Implementations§

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impl<'tcx> !RefUnwindSafe for OutlivesBound<'tcx>

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impl<'tcx> Send for OutlivesBound<'tcx>

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impl<'tcx> Sync for OutlivesBound<'tcx>

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impl<'tcx> Unpin for OutlivesBound<'tcx>

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impl<'tcx> !UnwindSafe for OutlivesBound<'tcx>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes

Size for each variant:

  • RegionSubRegion: 24 bytes
  • RegionSubParam: 24 bytes
  • RegionSubAlias: 24 bytes